55434401440 has 48 divisors (see below), whose sum is σ = 142869575520. Its totient is φ = 20157963520.

The previous prime is 55434401401. The next prime is 55434401447. The reversal of 55434401440 is 4410443455.

It is a super-2 number, since 2×55434401440² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55434401396 and 55434401405.

It is not an unprimeable number, because it can be changed into a prime (55434401447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15746650 + ... + 15750169.

It is an arithmetic number, because the mean of its divisors is an integer number (2976449490).

Almost surely, 2^55434401440 is an apocalyptic number.

It is an amenable number.

55434401440 is an abundant number, since it is smaller than the sum of its proper divisors (87435174080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55434401440 is a wasteful number, since it uses less digits than its factorization.

55434401440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31496845 (or 31496837 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 55434401440 its reverse (4410443455), we get a palindrome (59844844895).

The spelling of 55434401440 in words is "fifty-five billion, four hundred thirty-four million, four hundred one thousand, four hundred forty".